You guys realize that the so called "new" twin screw compressor built by Vortech isn't built by Vortech at all, right? The compressor is nothing more than a rebadged Lysholm 140AX....the same unit that Whipple used to use with their kits. A nice set up, but hardly state of the art like Vortech might have you believe.
Truth be told, with the release of the 5th Generation Magnacharger a coupe of years ago and new line up of Eaton TVS blowers hitting the market last year, the traditional Twin Screw compressor is kind of the dinosaur in the positive displacement group right now. The Eaton based units when compared side by side, are now besting them in efficiency and airflow and they’re a lot cheaper to boot.
And the big reason nobody but Kenne Bell makes Positive Displacement kits for 5.0L’s has nothing to do with the OHV guys not needing them because of the 5.0L’s abundant torque making capability compared to the 4.6L.
They’re not produced because there’s really no place to put the intercooler brick below the unit compressor/blower. OHV engines don’t have near the room in their engine galley between the heads that the OHC engines do. Where the OHV engines have lifters, pushrods and complicated coolant passages sealed below the lower intake, the OHV engine has nothing but empty, dry real estate. Empty, dry real estate that was deemed a perfect environment for housing a nice, thick, heavy duty A/W coolant brick.
So, since intercooling isn’t much on an option with the OHV engine, you can only run them to a certain extent (as made evident by the Kenne Bell kits), before horsepower and repeatability is going to be limited by heat.
This doesn’t make them as marketable as the plethora of Centrifugal kits (with full A/A or A/W intecooling capability, so this is the reason many companies haven’t tackled them.
I wish more companys would come out with roots style blowers for the 5.0. Atleast it would give some competition to KB. How sweet would a FRPP or a Vortech Roots on a 5.0 be? I know i'd buy one for sure.
edelbrock just came out with one, i think there is only so much money in the aftermarket supercharger arena, the price is pretty low for these units as is.
That blower is designed for the Modular engines, not the OHV...sorry.
